28008027530 has 32 divisors (see below), whose sum is σ = 58405791744. Its totient is φ = 9471206016.

The previous prime is 28008027469. The next prime is 28008027533. The reversal of 28008027530 is 3572080082.

It is a happy number.

It is a super-2 number, since 2×28008027530² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28008027533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2735402 + ... + 2745621.

It is an arithmetic number, because the mean of its divisors is an integer number (1825180992).

Almost surely, 2^28008027530 is an apocalyptic number.

28008027530 is an abundant number, since it is smaller than the sum of its proper divisors (30397764214).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28008027530 is a wasteful number, since it uses less digits than its factorization.

28008027530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5481110.

The product of its (nonzero) digits is 26880, while the sum is 35.

The spelling of 28008027530 in words is "twenty-eight billion, eight million, twenty-seven thousand, five hundred thirty".